- (A) hr (time)
- (B) sqm (area)
- (C) °C (temperature)
- (D) cm (thickness)
- (E) kcal (heat).
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- (A) the time taken to attain the final temperature to be measured
- (B) the time taken to attain 50% of the value of initial temperature difference
- (C) the time taken to attain 63.2% of the value of initial temperature difference
- (D) determined by the time taken to reach 100°C from 0°C
- (E) none of the above
- (A) 0.1
- (B) 0.23
- (C) 0.42
- (D) 0.51
- (E) 0.64
- (A) m2/hr
- (B) m2/hr°C
- (C) kcal/m2 hr
- (D) kcal/m.hr°C
- (E) kcal/m2 hr°C
- (A) Equivalent thickness of film
- (B) Thermal conductivity Equivalent thickness of film Specific heat x Viscocity
- (C) Thermal conductivity Molecular diffusivity of momentum Thermal diffusivity
- (D) Film coefficient x Inside diameter Thermalconductivity
- (E) none of the above
- (A) moisture
- (B) density
- (C) temperature
- (D) all of the above
- (E) none of the above
- (A) a dimensionless parameter
- (B) function of temperature
- (C) used as mathematical model
- (D) a physical property of the material
- (E) useful in case of heat transfer by radiation
- (A) high thickness of insulation
- (B) high vapour pressure
- (C) less thermal conductivity insulator
- (D) a vapour seal
- (E) all of the above
- (A) its temperature
- (B) nature of the body
- (C) kind and extent of its surface
- (D) all of the above
- (E) none of the above
- (A) aluminium
- (B) steel
- (C) brass
- (D) copper
- (E) lead
